| 摘要 |
PURPOSE:To prevent an unexposed film from being exposed in a camera wherein a film is wound preliminarily and then rewound in a cartridge on every shot, by turning off a power source manually or in interlocking with a back cover. CONSTITUTION:A power switch SW0, while turned on and off manually, is interlocked with a back cover and, when the back cover is opened, is turned off. Therefore, even when a film is loaded, neither a logical circuit nor a motor driving circuit operates unless the back cover is closed. Consequently, an unexposed film is prevented from being exposed owing to erroneous preliminary winding. |
